Improvement in automatic fans



W. DUGHEMI-N. Automatic Fan No. 207,022; Patented Au 13, 1878.

hi/42w MPETERS. FMOWLITIQOGRAPMBR. WASHIN UNITED STATES. PATENT gOFFIoE.

XVILLLAM DUOHEMIN, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT lN AUTOMATIC FANS.

Specification forming part of Letters Patent No. 207,022, dated August13, 1878; application iiled I May 24, 1878.

To all whomwz't may concern;

Be it knownthat I, ll ILLIAM DUCHEMIN, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain Improvementsin Automatic Fans, of which the following is a specification:

This invention has for its object to provide a simple, compact,portable, and effective motor for giving a forcible vibration to a fan,and thereby creating a comparatively strong current or agitation of theair.

My invention consists in the means employed for converting continuousrotary motion produced by a train of springimpelled gearing into astrong vibratory motion, as I will now proceed to describe.

Of the accompanying drawings, forming a part of this specification,Figure 1 represents a front view of an apparatus embodying my invention.Fig. 2 represents a section on line 0 .r, Fig. 1,1ooking at one side ofthe fly-wheel 1. Fig. 3 represents a section on line y y, Fig. 1.,looking at the other side of the flywheel 1?. Fig. 4 represents asection on line 2 2, Fig. 2 5 and Fig. Sreprescnts a view similar toFig. 3, but showing the ily-wheel at the end of one of its vibrations.

Similar letters of reference indicate like parts.

In the drawings, A represents a frame-work of any suitable construction,for. supporting the several shafts of a train of gearing, D E F G H I,and a rocking shaft S, to be hereinafter described.

The train is impelled by a suitable mainspring, B, which is alsosupported in the frame A. The last wheel I of the train is located on ashaft, J, which is provided with a surface cam, K, and with two pins, LL,projecting from opposite sides. 4

S represents a shaft, which is provided with a crank, S.

T represents a connecting-rod, which connects the crank S with the shaftJ. The rod S in each direction.

lengthwise, and thus impart a rocking motion to the shaft S.

P represents a fly-wheel, which is journaled to turn loosely on theshaft S.

U represents a flat spring, which passes loosely through apeculiarly-formed slot, V, in the shaft S, and is attached to pins orstuds U U on the side of the rim of the wheel 1.

The slotV is so formed as to admit of the partial vibration of thespring therein, stops 1 1 and 2 2 being formed in the slot to limit thevibrations of the spring, as shown in Fig. 5. It R represent wedges orcams arranged on. the periphery of the fiy-wheel 1 to operate devicesfor releasing the shaft J. These devices consist of lovers M l, pivotedto the frame A and supported by springs m, in such position that thedownwardly-projeeting pin L of the shaft J will be arrested by'the endof one of the levers M, as shown in Figs. 1 and 2. Each of the levers Mis provided with a vertieal rod or extension, N. These extensionsproject upwardly close to the periphery of the wheel 1?, and aredepressed by the cams or wedges It, as described hereinafter.

The operation of the apparatus is as follows:

The train of gearing being'set in motion, a rocking motion is impartedthereby to the shaft S, as before described, about one-eighth of acomplete revolution being given the shaft This rocking mot-ion causesthe stops 1 1 and 2 2 in the slot V to give the spring U a vibratingmotion, the stops 1 1 striking the spring simultaneously and impellin git in one direction, and the stops 2 2 impelling thesprin g in theopposite direction. The impulses thus given .the spring cause thevibration or oscillation of the wheel P on the shaft S but as the slot Vis formed to allow the spring to make about a quarter of a completerotation between the stops, or

about twice the rotation that is imparted to the shaft S, as beforementioned, it will be seen that the vibration of the wheel P will be ofincreased length.

The stops of the slot V at the end of each vibration of the shaft Seurvethe spring U and give it a tendency to rotate the fly-wheel P inthe opposite direction, and thus cause the spring to accelerate thereverse movement of the fiy-wheel produced by the reverse movement ofthe shaft S. The fiy-wheel is thus vibrated under the combined influenceof the spring U and the spring-impelled shaft S, and a strong impulse isgiven it in each direction, enabling it to vibrate the fan V withconsiderable force, the fan. V being attached to the Wheel, as shown.

The wed gcs or cams It R and the levers M M regulate the vibrations ofthe shaft S by first depressing one lever M and then another,

. each depression of a lever releasing the shaft 1. In an automatic fan,the combination of I the shaft S, means, substantially as described, forimparting a rocking motion thereto, and the fly-wheel P loose on saidshaft and carrying a fan,V, and the spring U whereby the rocking motionof the shaft is imparted in an increased form to the fly-wheel, as setforth.

2. The combination of the shaft J, rotated by suitable power andprovided with pins L L, the shaft S,arranged to receive a rocking motionfrom the shaft J, the fly-wheel P, con nected to the shaft S by spring Uand provided with the wedges or cams R R, and the intermediate stops MM,adapted to arrest the rotation of the shaft J and to be depressed by thewedges R R, as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subsoribin g witnesses this 22d day of May, 187 S.

\VILLIAM DUOHEMIN.

Witnesses:

B. F. EREBETII, C. 1. BROWN.

